AH 2500 Automatic Capacitance Bridge 1 kHz

The Andeen-Hagerling Model 2500A measures capacitance and loss in medium and high impedance ranges, and thus allows using three-terminal rather than five-terminal connections to the unknown.

Its unmatched precision is the result of a uniquely designed ratio transformer: the culmination of 15 years of Andeen-Hagerling bridge design and manufacture. Equally important is the unique temperature-controlled, fused silica capacitance standard which allows extremely high measurement stability and immunity to mechanical shock.

These elements combine to form a true bridge operating at 1 kHz to give capacitance results which are independent of the exact test frequency.

Key features

Includes Option E for enhanced performance as standard

Accuracy of 3 ppm

Stability better than 0.5 ppm/year

Resolution of 0.5 aF and 0.07 ppm

Temperature coefficient of 0.01 ppm/°C

Measures extremely low loss:

Dissipation factor: 1.5 x 10-8 tan δ minimum

Conductance: 3 x 10-7 nS minimum

Resistance: 1.7 x 106 GΩ maximum

Full precision measurements in < 0.5 s, and repeated measurements on the same sample in under 40 ms